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0. H. JA'DWIN.

TRAGTION CABLE RAILWAY.

No. 284,020. Patented Aug. 28, 1888.

INVBNTR ATTORNEYS.

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WIT NESSES I Za mJ/wm L/'. L/#v v) *"L Nrrnn @rar-ns @artnr @ittica ORLAND() H. JADVVIN, OF NEY YORK, N. Y.

TRACTlON-CABLE RELWY".

SPECIFICATION forming part of Letters Patent No. 284,020, dated August 28, 1883.

A pplicaticn filed March 31, 1853.

.To @ZZ whom it may concern.-

Be it known that I, ORLANDO II. JADWIN, of New York, in the county of New York and State of New York, have invented a' new and useful Improvement in Traction-Gable Itailways; and I do hereby declare that the following is a full, clear, and exact description ofthe same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l is a side view of a traction-cable tunnel with the near rail removed. Fig. 2 is a cross-section of the tunnel, wheel-rails, and stone iilling between the rails. Figs. 8, 4l., and 5 are cross-sections of different forms of rails for constituting the cable-tunnel. y

My invention relates to certain improvements in traction-cable railways; and it consists, first, in the arrangement of guide-pulleys for sustaining the cable, and, secondly, inthe construction of rails forming the tunnel in which the cable travels, as hereinafter fully described.

In the drawings, D is the draft-bar of a car, C, and B is the gripper fastened thereto and adapted to clutch the cable E. This cable travels in a tunnel in the street, formed by iron rails, as hereinafter described, and is supported as it travels upon twinguide-pulleys F F. These pulleys are grooved to receive the cable, and they are arranged in twin pairs, being `mounted upon spring-boards G in the pits or wells II. This spring-board is sustained at its ends, andit has, in connection withthe arrangement of the pulleys in pairs, the following ad-` vantages: first, that it makes a better bearing for the cable and reduces strain on the latter, the inequalities of one pulley serving to eompensate, in a measure, for the inequalities ofthe other, and the cable is not displaced or whipped about by passage over the pulleys; and, secondly, the spring-seated mountings ofthe pulleys compensate for any eccentricity of the pulley axis or projection onthe cable, and insures smooth running, reducing wear and tear. These pulleys may be arranged in vertical planes, as shown, for supporting the cable, or

they may be arranged in a horizontal or other plane, as may be necessitated by the curve or (No model.)

inclination of the track. They may also be mounted upon elevated posts, instead of being placed in a tunnel under ground.

In the patent granted me September 26, 1882, I showed and described a rail for forming the tunnel, which rail had a basic iiange on both sides of a central vertical web and a flange on one side at the top, and two of which rails,when

placed together to form the tunnel for the relception of a traction-cable, left a narrow slit one piece in cross-section or in two pieces, as

desired. Thus A represents the simplest form of my improved rail, in which there is formed at its upper edge a cavity, a, which is inclosed by obliquely offsetting flange a and the straight continuations b of the web portion. At A is shown the means for connecting this form of rail in continuous length by fish-plates and bolts c. At A2 is shown the cavity formed by a flange, a, made separately and bolted on, the iish-plate in this instance being made in U shape, as at c. At A3 A4, Fig. 3, is shown the rail made in two sections of equal height, one having a straight web portion and the other having its web portion offset at the top, so as.

to forni the trough for the asphaltum or cement. The two sections A3 and A4 may be arranged with lap-j oints, so as to avoid entirely the necessity of fish-plates. This form of the rail is well adapted to laying cross-tracks, as the upper end of the part A3 may be cut away, in which case the bend at the upper part 0IA forms an excellent rest or shoulder for a cross'A section of rail or cover for pulley-wells.` In all of these cases provision is made for avoiding a large exposure of metal at the surface, and yet ample room is left for fish-plates without interfering with the small central space between the rails at the top through which the gripping devices pass. p

In defining my invention with greater clearness with respect to the double or paired arrangement of the pulleys I would state that I am aware that a spring-seated pulley is not new, and that the pulleys have been arranged in pairs upon the opposite sides of the fulcrum of a rocking frame, as shown in my prior Patents Nos. 195, 509 and 223,592. When thus arranged in pairs upon a rocking frame,both pulleys must of a necessitynd an equal bearing against the cable. Ihave found, however,that when the pulleys are not located on arocking frame the pairing of them has an important re-V sult, :for here, although there can be no compensating movement of the rocking frame to` make them both bear equally, still an important result is attained as follows: Guide or supporting pulleys, no matter how carefully adjusted, will scarcely ever be exactly hung in the center, but will be more or less eccentric,

`and as they wear they become still more eccentric, which, when the pulleys are not in pairs, causes the cable to be whipped about.

Now, by placing the pulleys in pairs on a nonrocking support, or a support which does not give a reversed movement of the pulleys, the eccentricity or greater projection on one side of its axis of one pulley will never, or scarcely ever, coincide or be on the same side of the axis as the eccentricity of the other pulley, andthe result is that the cable will,{ by their conjoint and alternate support, be steadily sustained in its travel.

Having thus described my invention, what I claim as new is- 1. The combination, with a traction-cable, of guide or supporting pulleys arranged in pairs upon a non-rocking support, whereby the whipping ofthe cable from irregularities in the supporting-pulleys is avoided.

2. 'Ihe combination, with a traction-cable, of a pair of guide or support pulleys mounted upon a spring-board, substantially as shown `and described.

ORLANDO H. JADWIN.

pose set forth.

Witnesses:

C. SEDGWICK, J. L. MCAULIFFE. 

